package com.yimixian.app.ui;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.os.Handler;
import android.os.Parcel;
import android.os.Parcelable;
import android.util.AttributeSet;
import android.util.Log;
import android.view.Gravity;
import android.view.View;
import android.widget.TextView;

import com.ymx.sdk.util.DeviceUtils;

/**
 * Created by zhilian-2 on 2015/11/30.
 */
public class AutoScrollTextView extends TextView implements View.OnClickListener {
    public final static String TAG = AutoScrollTextView.class.getSimpleName();

    private float textLength = 0f;// 文本长度
    private float viewWidth = 0f;
    private float step = 0f;// 文字的横坐标
    private float y = 0f;// 文字的纵坐标
    private float temp_view_plus_text_length = 0.0f;// 用于计算的临时变量
    private float temp_view_plus_two_text_length = 0.0f;// 用于计算的临时变量
    public boolean isStarting = false;// 是否开始滚动
    private Paint paint = null;// 绘图样式
    private CharSequence text = "";// 文本内容
    private float speed = 0.5f;
    private int textColor=0xFF000000;

    public int getTextColor() {
        return textColor;
    }

    public void setTextColor(int color) {
        this.textColor = color;
    }

    public float getSpeed() {
        return speed;
    }

    public void setSpeed(float speed) {
        this.speed = speed;
    }

    public AutoScrollTextView(Context context) {
        super(context);
        initView();
    }

    public AutoScrollTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        initView();
    }

    public AutoScrollTextView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        initView();
    }



    private void initView() {
        setGravity(Gravity.CENTER_VERTICAL);
        setOnClickListener(this);
    }



    float left, right;
    public void init(float width, float left, float right) {
        text=super.getText();
        this.left = left;
        this.right = right;
        paint = super.getPaint();
        //      Paint paint=new Paint();
        text = getText().toString();
        textLength = paint.measureText(text.toString());
        //      viewWidth = getWidth();
        //      if (viewWidth == 0) {
        //          if (windowManager != null) {
        //              Display display = windowManager.getDefaultDisplay();
        //              viewWidth = display.getWidth();
        //          }
        //      }
        viewWidth=width;
        step = textLength;
        temp_view_plus_text_length = viewWidth + textLength;
        temp_view_plus_two_text_length = viewWidth + textLength * 2;
        y = getTextSize() + getPaddingTop();
        paint.setColor(textColor);
    }

//    @Override
//    public Parcelable onSaveInstanceState() {
//        Parcelable superState = super.onSaveInstanceState();
//        SavedState ss = new SavedState(superState);
//
//        ss.step = step;
//        ss.isStarting = isStarting;
//
//        return ss;
//
//    }

//    @Override
//    public void onRestoreInstanceState(Parcelable state) {
//        if (!(state instanceof SavedState)) {
//            super.onRestoreInstanceState(state);
//            return;
//        }
//        SavedState ss = (SavedState) state;
//        super.onRestoreInstanceState(ss.getSuperState());
//
//        step = ss.step;
//        isStarting = ss.isStarting;
//
//    }

//    public static class SavedState extends BaseSavedState {
//        public boolean isStarting = false;
//        public float step = 0.0f;
//
//        SavedState(Parcelable superState) {
//            super(superState);
//        }
//
//        @Override
//        public void writeToParcel(Parcel out, int flags) {
//            super.writeToParcel(out, flags);
//            out.writeBooleanArray(new boolean[] { isStarting });
//            out.writeFloat(step);
//        }
//
//        public static final Parcelable.Creator<SavedState> CREATOR = new Parcelable.Creator<SavedState>() {
//
//            public SavedState[] newArray(int size) {
//                return new SavedState[size];
//            }
//
//            @Override
//            public SavedState createFromParcel(Parcel in) {
//                return new SavedState(in);
//            }
//        };
//
//        private SavedState(Parcel in) {
//            super(in);
//            boolean[] b = new boolean[]{};
//            if (in == null)return;
//            in.readBooleanArray(b);
//            if (b != null && b.length > 0)
//                isStarting = b[0];
//            step = in.readFloat();
//        }
//    }

    public void startScroll() {
        if (mHandler != null && getContext() != null)
            mHandler.removeCallbacksAndMessages(getContext());
        isStarting = false;
        int screenWidht = DeviceUtils.getScreenWidth(getContext());
        if (textLength > screenWidht - left - right){
            isStarting = true;
            invalidate();
        }
    }

    public void stopScroll() {
        isStarting = false;
        invalidate();
    }

    Handler mHandler = new Handler();
    @Override
    public void onDraw(Canvas canvas) {
        //      super.onDraw(canvas);

        canvas.drawText(text,0,text.length(), temp_view_plus_text_length - step, y, paint);
        if (!isStarting) {
            return;
        }

        if (step == textLength){
            mHandler.postDelayed(new Runnable() {
                @Override
                public void run() {
                    invalidate();
                    step += speed;
                }
            }, 2000);
        }else{
            step += speed;
            if (step > temp_view_plus_two_text_length)
                step = textLength;
            invalidate();
        }
    }

    @Override
    public void onClick(View v) {
        if (isStarting)
            stopScroll();
        else{
            startScroll();
        }

    }

}